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![Hydronica](https://secure.gravatar.com/avatar/245dcc12ed7b664266f56fa99e34efcf/?default=https%3A%2F%2Fvanillicon.com%2Ff029940048cbb60243684002dbd32126_200.png&rating=g&size=200)
Hydronica
Member Posts: 3
You mention a "loop seal" several times in your book A Pocketful of Steam Problems. What is it, how is it constructed, and what does one look like?
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Loop seal
It's simply a U-shaped piping arrangement that fills with water and stops the steam. From the end of a steam main it would turn down vertically about five feet and then turn horizontal for a few inches before turning vertical again to join the dry return.Retired and loving it.0
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